File processing in C.

[query]

I have to do the following:

a)To read the EXIF/Non-EXIF image files from the user specified directory/folder name and to store their respective image information in the form of list- Linked List

b)From the lsited EXIF image files I have to sort (Linked list containing EXIF imzage files) them on the following basis :-

- Name of the image files (Ascending / Descending)
- File Date (Ascending / Descending)
- Size of the image files (Ascending / Descending)

Looking forward to the respose.
Thanks.